Inductive displacement sensors

A transducer for an inductive displacement sensor comprising

• the transducer and a target suitable for moving according to a degree of freedom with respect to the transducer, the transducer comprising:
• at least one primary winding;
• and
• at least one first secondary winding extending in a zone of length Dtot parallel with said degree of freedom i.e. parallel with a direction x of displacement of the target with respect to the transducer, comprising 2N turns of alternating winding directions each having an edge of dimension approximately equal to Dtot/2N parallel with said degree of freedom, regularly distributed along the length Dtot, where N is an integer greater than or equal to 2,
• and each of said at least one first secondary winding comprises:
• a first coiled conductive section forming N half-turns, extending between a first end of the at least one first secondary winding, situated approximately at a midpoint of the length Dtot, and a first intermediate point of the at least one first secondary winding, situated at a first end of the length Dtot;
• a second coiled conductive section forming N half-turns, complementary with the N half-turns of the first coiled conductive section, extending between the first intermediate point and a second intermediate point of the at least one first secondary winding, situated approximately at the midpoint of the length Dtot;
• a third coiled conductive section forming N half-turns, extending between the second intermediate point and a third intermediate point of the at least one first secondary winding at a second end of the length Dtot;
• and
• a fourth coiled conductive section forming N half-turns, complementary with the N half-turns of the third coiled conductive section, extending between the third intermediate point and a second end of the at least one first secondary winding situated approximately at the midpoint of the length Dtot;
• and
• a first and a second connection terminals of the at least one first secondary winding respectively connected to the first and second ends of the at least one first secondary winding and a third access terminal of the at least one first secondary winding connected to the second intermediate point of the at least one first secondary winding.